烂泥扶不上墙

1. • useless (idiom)
2. • worthless
3. • inept

Character by character

• 烂(làn)soft
• 泥(ní)mud
• 扶(fú)support with the hand
• 不(bù)no
• 上(shàng)up
• 墙(qiáng)wall